Kingspan Kooltherm K103 Floorboard Insulation | 2400mm x 1200mm (Packs)

KingspanSKU: BM00135
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Sale price£492.32 

inc VAT

Pay in 3 prices shown are an example only. Total calculated at checkout.

Delivery within 5 - 7 working days

Free Delivery On Orders
Over £499.95 Ex-Vat

Need something quicker?

Contact us on 0300 303 4578
or email here!

Kooltherm K103 in packs, for single sheets click here.

Kooltherm K103 Floorboard is at the forefront of floor insulation, designed to integrate seamlessly with both solid concrete and suspended timber floors.

This premium performance insulation not only boasts an impressive thermal conductivity of 0.019 W/mK, making it one of the most efficient floor insulating materials available, but it also offers a range of benefits tailored to enhance the construction and refurbishment of modern buildings.

Features and Benefits

  • Ultra-Thin Design: As one of the thinnest insulation materials used in floor applications, Kooltherm K103 allows builders and architects to achieve desired U-values with minimal material thickness, enabling sleeker floor designs and efficient use of space.

  • Cost-Saving Potential: The reduced thickness of Kooltherm K103 can lead to significant cost savings on related construction activities, such as soil removal and the installation of service connections, making it a cost-effective solution for projects of all sizes.

  • Underfloor Heating Compatibility: Kooltherm K103 is optimally designed to work in conjunction with underfloor heating systems, ensuring a warm and comfortable environment without compromising floor levels or energy efficiency.

Application Areas

Kooltherm K103 is versatile enough for application in a wide range of floor insulation projects, including new builds and refurbishments, with its compatibility extending to both solid concrete and suspended timber floors.

Technical Specifications

  • Material: A lower-lambda rigid thermoset phenolic insulation, known for its premium performance and durability.
  • Thermal Conductivity: 0.019 W/mK, offering exceptional thermal efficiency.
  • Facings: Each board is faced on both sides with a glass tissue-based facing, ensuring a strong bond and added durability.
  • Dimensions: Available in large sheets of 1200 x 2400mm, accommodating a variety of project sizes.
  • Thickness Range: From 25mm to 150mm, providing flexibility in application and insulation depth.
  • Fire Performance: Achieves a Euroclass C-s2,d0 rating, indicating good performance in fire safety tests.
  • Compressive Strength: 120 kPa at 10% compression, ensuring durability under load.

Kooltherm K103 Floorboard sets a new standard for floor insulation solutions, combining high thermal efficiency with flexibility, durability, and ease of installation. Whether for new construction projects or refurbishments, Kooltherm K103 is the optimal choice for achieving high-performance insulation in floor systems.


Kingspan Kooltherm K103 Floorboard Brochure

Order Value Delivery Charge
Up to £200.00 ex-vat £75.00 ex-vat
£200.00 - £499.95 ex-vat £55.00 ex-vat
Above £499.95 ex-vat Free Delivery


 Jablite Products Delivery Charge
Order Value Delivery Charge
£80.00 - £500.00 ex vat £59.95
Above £500+ ex vat Free Delivery


Weekend Delivery
Available upon request


Parcel Rates
Delivery charge may vary depending on quantity and volume of your order.
Pricing will be calculated during checkout.


Local Delivery Charge
Within 35 miles of Postcode S63 9BL - Up to £500.00 ex-vat
Delivery Charge £35.00 ex-vat
Please contact us to arrange collections
Tel: 03300 55 32 02 | Email:


  • Delivery charges will automatically be calculated within the checkout process.
  • Orders are only processed for delivery between 8.30am - 5.00pm Monday to Friday excluding bank holidays.
  • Moffett offload will be used for large bulky deliveries and only when agreed with you.
  • Please advise of any access issues on ordering.
  • Delivery is Kerbside only.
  • In the unlikely event that your delivery is not correct or damaged please notify us immediately and mark any issues on the delivery slip.


    Where We Deliver

    Delivery Areas

    We have a fleet of FORS delivery vehicles all with Moffett mechanical off loads that deliver nationwide. Sometimes we may use 3rd party carriers for smaller orders.


      Product Delivery Times

      • The vast majority of our orders are dispatched within 3 working days, this can however be up to 5 working days, please contact us if you require something urgent.
      • Speciality items may take up to 5-7 working days.
      • We will contact you with in 24/48hrs of your order been placed to confirm delivery times and dates.

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